The structure that cushions and reduces friction around joints is known as?

The structure that cushions and reduces friction around joints is primarily referred to as a bursa. Bursae are small, fluid-filled sacs located at joints and other areas where friction occurs, such as between tendons, muscles, and bones. They help to minimize wear and tear during movement by acting as a cushion, thus allowing for smoother motion and reducing the risk of injury.

While cartilage does play an important role in joint health by providing a smooth surface for joint movement and absorbing shock, it is not specifically designed for the purpose of reducing friction in the same way that bursae do. Tendons attach muscles to bones and are not involved in cushioning joints. Ligaments, on the other hand, connect bones to other bones and provide stability to joints but do not function as cushioning structures. Thus, the bursa is uniquely suited to protect and reduce friction in these critical areas.